I've got an unfair advantage here since I've been abusing dwight for some time now. '76 terra with 345/727/d20. The point is a good one. Dwight, you ought to think about going into the user cp and adding a signature line with merle's vitals so that anytime you start a new thread about him, they show up automatically at the bottom of each post.
Now, the fact that merle has a 727 makes the t-case shifting a little hinky as compared to a Scout with a manual trans. That's just part of the deal. You'll get used to it as we all do. The proper procedure for shifting into the various locations is as follows:
into 4lo from any other position: bring the vehicle to a complete stop. Depress the brake and shift the transmission gear selector into nuetral. Apply firm forward pressure to the t-case lever until 4lo is engaged.
From 4lo into 2hi: basically a reverse of the above procedure with a few addditions. While you are pulling back on the t-case lever, you will want to slowly cycle the trans gear selector from
n-r-p then p-r-n. This should get the t-case at least into n if not all the way into 2hi. If you encounter grinding from n to 2hi, the best thing to do is shut the engine off. Wait a few seconds and then pop the lever from n to 2hi and restart. Yeah, it's a pita, but it does help. You don't want to just keep fighting and grinding.
Shifting from 2hi to 4hi and back is meant to be done and best achieved on the fly. When going from 2 hi into 4hi, you want to be accelerating mildly as you pull on the lever. You want to be decelerating a little as you go from 4hi back into 2hi. Now this doean't mean that you can't engage or disengage 4hi from a dead stop, it's just easier to do it in motion. Hope that helps.